Lochinvar & A.O. Smith 100208655 Flow Switch 340155-7026 engineered for high-performance combustion air

engineered for high-performance combustion air management

The DS25 Berko switch fits perfectly into the heater's internal wiring housing

and livestock watering tanks

Industrial-Grade Piston: Stainless steel shaft prevents bending and maintains smooth linear motion control across the full 2-inch stroke

Precise Regulation: Maintains a 5°F to 15°F differential to prevent rapid cycling and improve the longevity of your heating elements

Lochinvar & A.O. Smith 100208655 Flow Switch 340155-7026 engineered for high-performance combustion airThe Lochinvar & A. O. Smith 100208655 Flow Switch is a critical safety component designed for Copper Fin II pool heaters and commercial water heating systems. This OEM replacement flow switch features a 2 inch NPT connection and SPST (Single Pole Single Throw) circuitry to provide precise water flow monitoring. By verifying adequate flow before ignition, it prevents dry firing and high limit trips, safeguarding the heat exchanger from thermal stress